Water/Meth Nozzle sizing

[85oceanic]

Hey guys, I was wanted to find out how to choose the correct nozzle size for a water/meth injection setup; more specifically mine. Most of you know I am going to be running a 5857 with power-goals between 450 and 550. What do you guys think?

[audifreakjim]

Repost from here
viewtopic.php?f=11&t=73&p=43854#p43854

The Howerton manifolds look nice, and are reasonably priced when you take into consideration the fittings they have included. I am thinking of ordering a 4 port, and adding another fitting to the end to make it a total of 6 ports.

Here is what I think I am going with. .5mm aquamist nozzles, in each port, and one .5mm nozzle pre-compressor. The port nozzles will be hooked to the High Speed valve, the pre compressor nozzle will be a simple on off solenoid to avoid large droplets hitting the compressor. This way I can control each one independently which is always nice to have. The port injectors will be large enough to satisfy injection needs alone, but will be scaled back a touch to make room for the pre-compressor injector.

Right now I am injecting about 5000 cc's of injector capacity, so this will net about 1200cc's which is 24% and about the max you will ever want to go. Aquamist flow rates are here
http://howertonengineering.com/tech-info/

Ben, I was using two 1mm nozzles with that turbo and it was a good match. I have 75# injectors running at 60 psi base pressure. But if you look in my thread, I was seeing some detonation, it decreased as you went back to cyl 5 because the heavy water was not getting to the front cyl. I have tasted how just 3-4 degrees of extra timing feels at this level, which is why I am going port injection.

[85oceanic]

Right on Jim, that's exactly what I needed. Thank you!